To give birth to Pumbaa is to push out a huge log ... to have a shit ... It's big, brown and smelly just like Pumbaa from The Lion King ... think of Pumbaa being born.
I’d give my left nut to… — one of the larger hyperbolic lies men tell to express an acquisitive faux passion.
I don’t know any men who would actually give up their left nut for any reason! But, I and a lot of men I know have said this at least once in our lifetime — usually expressing a desire in an arena where loosing a nut would be counter productive.